When did simon fraser explore the fraser river?

when did the united states declare its independence?

What city was taken back by sumerians in 2100 bc

Which is likely the most serious problem associated with an epidemic? 1. there are sometimes no cures to the diseases that spread. 2. people often die from the diseases that spread. 3. there are usually no ways to prevent people from getting ill. 4. people often don’t know they have a disease.

Which of the islamic empires (ottomans, mughals, safavids) were the most influential and why?